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- Title
ENVIRONMENTAL FACTORS RELATED TO GALL RUST DISEASE DEVELOPMENT ON FALCATARIA MOLUCCANA (MIQ.) BARNEBY & J. W. GRIMES AT BRUMAS ESTATE, TAWAU, SABAH, MALAYSIA.
- Authors
RAHAYU, S.; SEE, L. S.; SHUKOR, N. A. A.; SALEH, G.
- Abstract
Gall rust disease caused by Uromycladium falcatarium (Sacc.) is one of the most destructive diseases of Falcataria moluccana plantations in parts of South-East Asia. The disease causes severe damage throughout all developmental stages from seedlings to mature trees. Chocolate brown, cauliflower- or whip-like galls are observed on stem, branch, petiole, shoot and pod. The objectives of this study at Brumas Estate, Tawau, Sabah were to (i) determine the status of gall rust disease, (ii) examine the relationship between disease incidence and environmental factors that may influence disease development, and (iii) predict the origin gall-rust spores. The sampling intensity was 10% of the total area at each site. Three blocks at each site contained three replicates, each containing three plots of 10 trees for observations. More open sites, flat topography, absence of fog, greater age and lower altitude were associated with reduced gall rust disease incidence and severity; high relative humidity and low wind speeds promoted gall rust disease development. As winds blew predominantly from the north-east, gall rust spores may have spread from the north, probably from the Philippines to Tawau.
- Subjects
FALCATARIA moluccana; RUST diseases; DISEASE incidence; HUMIDITY; WIND speed
- Publication
Applied Ecology & Environmental Research, 2018, Vol 16, Issue 6, p7485
- ISSN
1589-1623
- Publication type
Article
- DOI
10.15666/aeer/1606_74857499